POLYPODIACE^. 



139 



under surface of a paler colour than the upper. Pinnae sessile, 

 spreading, subalternate, and deeply pinnatifid; the inferior 3 to 4 pairs 

 distant. Segments lanceolate, partially acuminate, falcate, with a 

 spinulose-serrate, somewhat repand margin, the lower and inferior one 

 adnate to the rhachis ; the latter in a young state paleaceous-hirsute. 

 Sinus usually about as wide as the breadth of the segments, and 

 rounded at the base. Veins of a pale colour, transparent, and not 

 anastomosing more than twice ; the venules towards the margin 

 parallel and free. 



This has been referred by Kaulfuss to the Wbodwardia radicans of 

 Swartz, in which he is followed by Hooker and Arnott, in the Botany 

 of Beechey's Voyage ; while we cannot but consider the Californian 

 plant as a distinct species, on account of the erect fronds, the total 

 absence of any proliferous bud on the rhachis, the more falcate seg- 

 ments, with a wide sinus, rounded at the base, and the pale veins, 

 which are not so compoundly reticulated.. 



Tribe IY. ASPLENIE^E, J. Sm. 



This tribe Mr. J. Smith has divided into two sections ; the first 

 embracing those genera having a forked or pinnate free venation ; the 

 second, such as possess pinnate or forked veins, with the venules 

 variously anastomosing or reticulated. 



50. DIPLAZIUM, £w, 



* Frondes indivisse. 

 1. DlFLAZIUM PLANTAGINEUM, Sw.. 



Diplazium plantagineum, Sw. Syn. Ml. p. 91, t. 2, f. 4; Willd. Spec. PI. 5, p. 351; 



Gaud. Bot. Freyc. Voy. p. 322. 

 D. acuminatum, Raddi, Plant. Brasil. p. 41, t. 57, f. 2. 



